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R.E.M (Rekyasa Energi Manufaktur) Jurnal
Published by Universitas Muhammadiyah Sidoarjo
ISSN : 25275674     EISSN : 25283723     DOI : https://doi.org/10.21070/r.e.m
Core Subject : Engineering,
Engineering
Focus and Scope Aim: to facilitate scholar, researchers, and teachers for publishing the original articles of review articles. Scope: Mechanical Engineering include: Energy Conversion Renewable Energy Manufacturing Materials and Design Engineering Mechatronics
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 152 Documents
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(Performance of Gas Turbine Cooling System (Radiator) at PLTGU XYZ against Environmental Air Temperature) Ni Ketut Caturwati; Yusvardi Yusuf; Muhammad Ilham Al Faiz
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 1 (2020): Juni 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i1.889

Abstract

The heat exchanger is an important component in the gas and steam power plant (PLTGU) industry. One of the most important heat exchangers in gas turbine cooling systems is the gas turbine radiator. The gas turbine radiator functions to cool the cooling water, which circulated to various components of the gas turbine by using environmental air as the cooling medium. The purpose of this study was to determine the effect of environmental temperature on the performance of gas turbine radiators and to compare operational data in 2017 with operational data when the study conducted in 2019. Data collected for 3 days with 2-3 hour intervals. Data processing and analysis shows that the higher the ambient temperature, the higher the radiator effectiveness value. Data in 2017 shows the highest average value of effectiveness obtained at an ambient air temperature of 35 ˚C of 71,274%. Meanwhile, data in 2019 shows the highest average value of effectiveness at an ambient air temperature of 35 ˚C of 58,859%. Thus, the average effectiveness value of gas turbine radiators has decreased by 12,415% from 2017 to 2019
Analisa Uji Performasi Sistem Kemudi, Trnasmisi, dan Sistem Pengereman pada Mobil Listrik Tipe Urban Concept Warok V.1.1 Wawan Trisnadi Putra; Muhammad Malyadi
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 1 (2020): Juni 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i1.891

Abstract

Penelitian ini bertujuan melakukan uji performasi sistem kemudi, transmisi, dan sistem pengereman mobil listrik Tipe Urban Concept Warok V.1.1. Asumsi dasar mobil listrik dirancang dengan tipe Urban Concept (Kendaraan roda empat seperti mobil saat ini) yang disesuaikan dengan regulasi Kontes Mobil Hemat Energi (KMHE), yang diselenggarakan pemerintah Indonesia melalui Kemenristekdikti. Pada rancangan sistem kemudi menggunakan sistem kemudi berjenis ackerman, sistem transmisi menggunakan chain drive differential sedangkan sistem pengereman menggunakan cakram hidrolik. Pada hasil pengujian sistem kemudi memiliki sudut belok maksimum adalah 45 dengan radius belok kurang dari 6 meter, untuk sistem transmisi pada pengujian kecepatan putaran mesin roda belakang ( ) adalah 589,867 rpm dan putaran motor listrik 642,6 rpm dengan kecepatan rata – rata 53 km/jam. Besarnya perlambatan sistem pengereman adalah 4,901 dan 1,47 s untuk waktu pengeremannya.
Sidoarjo Mudflow Electric (SMF-E): Optimalization of Sidoarjo Mudflow as an Electric Supplier Based on Electrochemical Deni Ainur Rokhim
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 1 (2020): Juni 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i1.892

Abstract

Sidoarjo mudflow or known as Lusi (Lumpur Sidoarjo) is an ecological disaster that has caused the community fret. Most of them haven’t known that the mud contains elements that can produce electricity. This research aims to find the basic value that can be obtained from ecological disaster. The research design uses electrochemical method development with magnesium and copper electrodes. The result of the electric power that can be generated is 7,07135 watt/hour. It can reach an area of 4.405986 km2 or as wide as one residential in an electric production plant. The use of Lusi is very effective because it contains high metal and high salt content. The abundant amount of Lusi can be utilized effectively throughout this way
Perancangan Mekanisme Pelurusan Kawat SAE 304 (UNS S30400) Galvanized Menggunakan Prinsip Pengerolan Herman Susanto; Sunardi Tjandra
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 2 (2020): Desember 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i2.939

Abstract

Wire is a complement material on the manufacturing product. Therefore, the wire processes usually bestowed to the middle-low industry. Cutting and straightening wire processes are the most basic process for wire materials. In the middle-small industry, demand of wire materials is 150 kg per day. Seeing this potential, the design of a wire straightening mechanism for middle-low industries is necessary to maximize productivity. The main purpose of wire straightening mechanism design is calculating roll diameters and placement to obtain appropriate rolling force. In designing this wire straightening mechanism, the raw materials are used 3 mm SAE 304 (UNS S30400) Galvanized. The rolling method used in this mechanism is Three-Roll Bending. The empirical method is used on this analysis. Based on the analytical results, roll used on this mechanism are 5 pieces or equal with 3 cycle of rolling process with 40 mm of diameters. The vertical gap between center of rolls is 41.5 mm with 54 mm horizontal gap. Rolling force produced by the analytical roll dimension is 1608.69 N/cycle and that’s enough to give plastic deformation on the 3 mm SAE 304 (UNS S30400) Galvanized wire.
Effect Of Water Content On Characteristics Fuel From The Municipal Solid Waste Through The Pyrolysis Process Imron Rosyadi; Ni Ketut Caturwati; Ahmad Fauzi
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 2 (2020): Desember 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i2.974

Abstract

The increase in the population of Indonesia is proportional to the increase in the amount of waste produced. Municipal solid waste (MSW) especially organic waste, can be used as solid fuel by means of the torefaction process. Torefaction is a thermo-chemical heat treatment method for biomass conversion that takes place at a temperature of 200oC to 300oC under conditions of atmospheric pressure and in the absence of oxygen. The purpose of this study was to determine the effect of moisture content on calorific, proximate and ultimate values ​​of torefaction samples using municipal solid waste. Setting the water content in the mixed sample (30% rice + 70% wood) with variations in moisture content of 30%, 40%, and 50%; and rice and wood samples with variations in moisture content of 40% and 50%. The torefaction was carried out at a temperature of 300oC for one hour and inert gas N2. Torefaction products have been tested contain of the calorific value, proximate testing, and ultimate testing. The results obtained were the best calorific value in the rice sample, the moisture content of 40% was 6351.1 cal / g or equivalent to sub-bituminous coal. The proximate and ultimate results of the best heating value are rice samples with 40% moisture content, fixed carbon 62.95%, volatile matter 27.85%, moisture 7.06%, ash 2.14%, carbon 71.85%, hydrogen. 2.80%, nitrogen 3.17%, and sulfur 0.05%. The calorific value calculation method that is almost close to the test results is the Dulong method, with an average error percentage of 1.63%.
Kualitas Bahan Bakar Biogas Limbah Cair Tahu Dengan Penggunaan Variasi Komposisi Starter Nely Ana Mufarida; Asroful Abidin
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 2 (2020): Desember 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i2.1001

Abstract

Fossil fuels are a primary energy source. Fossil fuels that are widely used are in the form of fuel oil, gas fuel, and coal. Along with technological developments, the need for fossil fuels is increasing, which is followed by the depletion of supplies. Therefore, renewable energy is needed which is cheap and easy to use on a household scale such as biogas. Therefore, renewable energy is needed, which is cheap and easy to use on a household scale such as biogas. The materials used as biogas are tofu liquid waste with a yeast starter, EM-4, and horse manure. Tests on the quality of tofu liquid waste biogas conducted in this study include; Gas volume, temperature, degree of acidity (pH), C/N ratio, and gas content, namely methane (CH4), hydrogen sulfide (H2S), carbon monoxide (CO), and oxygen (O2). In the test results, it was found that the increase in the quality of tofu liquid waste biogas by using horse dung starter was producing a volume of 513.6 ml, a temperature of 31.7oC, a C/N ratio of 5.336, a CH4 content of 69%, and H2S content of 5 ppm, a CO content of 9 ppm and an O2 content of 16.3%.
Pipeline Insulation Analysis of Alpha Type Stirling Engine Generator Phase Angle 180° Dhimas Satria; Rina Lusiani; Erny Listijorini; Aswata
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 6 No 1 (2021): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v6i1.1058

Abstract

This research is a development of previous research, where in the previous research, a design innovation was carried out on an alpha-type stirling engine by making the phase angle to 180o, with the aim of reducing the effect when the cold cylinder is compressed, because the phase angle currently used is (90o) with disadvantages, namely the cold cylinder is perpendicular to the top, so that the compression process against gravity. But in previous studies, the generator pipe was too long, causing a lot of energy or heat loss (heat loss) so that the compression speed was small. So that in the research, innovated and analyzed the pipe insulation of alpha-type stirling engine generators, alpha-type stirling engines, 180o phase angle. The research method used is to use the thermodynamic approach with Schmidt theory and the theory of the ideal cycle stirling engine. while the simulation is done using the Ideal Stirling Cycle Calculator. Results investigated shows that providing insulation on the generator pipes of an alpha-type stirling engine for an alpha-type stirling engine with a 180o phase angle is proven to reduce a lot of energy or heat loss (heat loss) due to too long generator pipes, with a heat loss value ratio of 226.66 W for the pipe. generator that uses insulation whose value is smaller than the value of the heat loss when the generator pipe without using isocation is 1,584.12 W.
The Characterization of Oriza sativa Husk and Royal Ponciana pods Bricquettes edi widodo; Mohammad Dani Iswanto; Prantasi Harmi Thahjanti; Rachmat Firdaus
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 2 (2020): Desember 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i2.1214

Abstract

Rice mills produce abundant husk waste. The husks are used as a mixing material for bricks because they are flammable and have capability to form hot coals with high calor. This potential is used to develop the husks into briquettes. This study used rice husks (oriza sativa) and flamboyant pods (Royal ponciana) as the main ingredients for forming briquettes. This pods was chosen because had not optimally used. The composition of rice husk briquettes and flamboyant fruit skins made of 16.7%: 83.3%, 33.4%: 66.6%, 50%: 50%, 66.6%: 33.4%, 83.3 %: 16.7%. The briquettes formed were measured the calorific value, mass reduction using the TGA (Thermogravimetric analysis) thermal measurement method, and measured the values ​​of moisture, ash, volatile, and fixed carbon content. The results of the measurement of the lowest calorific value in rice husk briquettes were 83.3% with a value of 4,551 cal / gram, while the highest value was 5,945 cal / gram in rice husk briquettes percentage of 16.7%. The result of TGA measurement of the largest mass reduction was briquettes with a percentage of husk 83.3% having the highest mass reduction of 11.1 mg. The results of the measurement of water content obtained 7.04%, 24.70% volatile, 9.98% ash content, 58.28% fixed carbon
Effect of Angle of Attack on Airfoil NACA 0012 Performance Ali Akbar
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 1 (2020): Juni 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i1.1235

Abstract

Airfoil is an aerodynamic form intended to produce a lift force with the smallest drag force. When an airfoil is passed through a fluid flow that causes interaction between the air flow and the surface, variations in velocity and pressure will occur along the top and bottom surfaces of the airfoil, as well as the front and back of the airfoil. The difference in pressure between the upper and lower surface of the airfoil is what causes the resultant force in the direction perpendicular to the direction of fluid flow, this force is called the lift force (lift). In this experiment NACA 0012 airfoil experiments have been carried out using simple wind tunnel. Experiments were conducted with the aim to determine the effect of the angle of attack on the performance of the NACA 0012 airfoil which then analyzed the lift force of the NACA 0012 airfoil. The variation of the angle of attack used was 0 °, 3 °, 6 °, 9 °, 12 °, and 15 ° and used wind speed of 21.5 m / s. The greatest lift force is obtained at an angle of attack of 9 ° with a value of 0.981 while the largest lifting coefficient with a value of 0.106. The greater the angle of attack the greater the airfoil lift force, but for symmetrical airfoil stall at an angle that is too large
Effect Of Preheating On The Hardness And Microstructure In Shielded Metal Arc Weldments Of A283 B Ali Akbar
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 5 No 2 (2020): Desember 2020
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v5i2.1279

Abstract

The purpose of this study was to determine the effect of heating on the welding process of SMAW (Shielded Metal Arc Welding) in terms of hardness and microstructure of welded metal. Much welding has been done by preheating but below the temperature used below the initial martensitic temperature which reaches 452 ° C, this data is sourced from research by S.Zheng et.al and Y. Huang et.al. For this reason, an experiment was carried out with heat temperatures above a martensitic temperature of 500 ° C. The results show that in the Weld Metal area the pearlite structure appears larger, the effect of current strength on HAZ width is directly proportional, the greater the current strength, the wider HAZ, and hardness are affected by the rough grains of martensite

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